Memory usage

[Peter Morris]

I understand how .NET will force a garbage collection before an out of
memory exception etc, but I am still concerned with how much memory my .NET
app seems to hold onto according to the task manager.

Constantly my apps (all running via terminal services on the same machine)
are reaching around 100MB per user (8 - 15 users), but this drops down to
8MB when the app is minimised so I know I am not at fault myself!

I am guessing that the GC collects .NET objects but doesn't necessarily give
the ram back to Windows. Is there anything I can do about this? I'd like
my .NET app to be more memory friendly to other apps on the machine.


Thanks

Pete

[Peter Duniho]

Re: Memory usage

On Wed, 09 Jul 2008 08:57:44 -0700, Peter Morris
<mrpmorrisNO@SP AMgmail.comwrot e:

[...]
I am guessing that the GC collects .NET objects but doesn't necessarily
give the ram back to Windows. Is there anything I can do about this?
I'd like my .NET app to be more memory friendly to other apps on the
machine.

Rest assured, it is. What you see in Task Manager is a teeny tiny
snapshot of an instant in time, and doesn't tell you anything at all about
how your .NET application affects other processes that may be running on
the computer at the same time.

If you find a situation where your application could have returned memory
to the OS but hasn't and another process is suffering because of that,
_then_ you can start worrying. Until then, just trust that .NET knows
what it's doing. That's why you use the framework in the first place.

Pete

[Brian Rasmussen [C# MVP]]

Re: Memory usage

As Peter said the CLR does release memory to the OS. However, it usually
holds on to allocated memory for a little while longer than absolutely
needed in case memory new allocations should request more memory. Allocating
memory is not a cheap operation, so this makes sense.

--
Regards,
Brian Rasmussen [C# MVP]

http://kodehoved.dk

"Peter Morris" <mrpmorrisNO@SP AMgmail.comwrot e in message
news:eNkRJyd4IH A.4800@TK2MSFTN GP02.phx.gbl...

>I understand how .NET will force a garbage collection before an out of
>memory exception etc, but I am still concerned with how much memory my .NET
>app seems to hold onto according to the task manager.
>
Constantly my apps (all running via terminal services on the same machine)
are reaching around 100MB per user (8 - 15 users), but this drops down to
8MB when the app is minimised so I know I am not at fault myself!
>
I am guessing that the GC collects .NET objects but doesn't necessarily
give the ram back to Windows. Is there anything I can do about this? I'd
like my .NET app to be more memory friendly to other apps on the machine.
>
>
Thanks
>
Pete

[Chakravarthy]

Re: Memory usage

Did you ever got to know about CLR Profiler.. try this, you will understand
in detail as why you see the differences in the memory sizes.

HTH



"Peter Morris" <mrpmorrisNO@SP AMgmail.comwrot e in message
news:eNkRJyd4IH A.4800@TK2MSFTN GP02.phx.gbl...

I understand how .NET will force a garbage collection before an out of
memory exception etc, but I am still concerned with how much memory my
.NET app seems to hold onto according to the task manager.
>
Constantly my apps (all running via terminal services on the same machine)
are reaching around 100MB per user (8 - 15 users), but this drops down to
8MB when the app is minimised so I know I am not at fault myself!
>
I am guessing that the GC collects .NET objects but doesn't necessarily
give the ram back to Windows. Is there anything I can do about this? I'd
like my .NET app to be more memory friendly to other apps on the machine.
>
>
Thanks
>
Pete